strmove.cpp

来自「This is the second part of that lab manu」· C++ 代码 · 共 22 行

//: C05:Strmove.cpp
// From "Thinking in C++, 2nd Edition, Volume 2"
// by Bruce Eckel & Chuck Allison, (c) 2001 MindView, Inc.
// Available at www.BruceEckel.com.
// ostrstream memory movement
//{L} ../TestSuite/Test
#include <iostream>
#include <strstream>
using namespace std;

int main() {
  ostrstream s;
  s << "hi";
  char* old = s.str(); // Freezes s
  s.rdbuf()->freeze(0); // Unfreeze
  for(int i = 0; i < 100; i++)
    s << "howdy"; // Should force reallocation
  cout << "old = " << (void*)old << endl;
  cout << "new = " << (void*)s.str(); // Freezes
  delete s.str(); // Release storage
} ///:~